BBC NEWS | Middle East | Volcano erupts on Red Sea island
Hey, it's quite an extensive list really (the things I don't know), but the fact that there are any volcanoes in the Red Sea could have been included until this story broke.
Having heard the report, I wondered whether anyone had ever speculated that volcanoes in that area might have something to do with some Old Testament stories.
And, of course, Google quickly reveals that someone has suggested it already. (Jeez, don't you hate how it's getting harder and harder to even imagine that you have had an original thought since the internet came along.)
Anyhow, Colin Humphreys has suggested that Mt Sinai was an active volcano at the time Moses was hanging around there. Go have a read of his few pages from Google books (at the last link) and see if it sounds credible. (I suppose we should be asking geologists too, but they might ruin an otherwise plausible idea.)